Machining guidelines - Milling

The majority of plastics are easy to machine. Depending on the type of plastic involved, there are various details that have to be taken into due account.

In a milling process, the tool (at a high rotational speed) performs a circular cutting movement. And the feed movement is performed at right angles to the rotary axis by the workpiece. Due to the continual interruption to the cut, comma-shaped chips are formed. Milling is classed as a multiple-blade cutting process. A distinction is drawn between face-milling (frontal milling) and circumferential milling (side-milling).

Machining guidelines milling

L’avance peut aller jusqu’à 0,5 mm.

v

Setting Angle

Rake Angle

Cutting Speed in m/min

PVC

5-10

0-15

1000

PP,PE-HD

10-20

5-15

250-500

ABS

5-10

0-10

300-500

PMMA

2-10

2-10

2000

PVDF

5-15

5-15

250-500

PET

5-15

0-15

bis1000

POM

5-15

5-15

250-500

ECTFE

10-20

5-15

250-500

PC,PPE

5-20

5-15

250-350

PEEK

5-15

5-15

180-230

PSU

10-20

5-15

200

PES

10-20

5-15

200

PEI

10-20

5-15

200

GF/mod

15-30

6-10

80-100

Note:

Metalloid cutting tools should sometimes be preheated up to 120 °C

Use only pure water with liquid cooling (tension cracks may accur)

Amorphous materials should be annealed (do not use oily cooling agents)